Sounds like you have done an excellent job. The school administration is on your side. The bully is being moved out of your environment. And you have a paper record supporting your side with the school and with the police.
Obviously, the single mom has lots of problems and so does her son. Not much you can do there, but protect your family and not participate in her problems.
Selecting an attorney and prepping with him is an excellent idea.
But it seems to me that the best revenge is going about and enjoying your life. Dont make yourself hostage to the crazy mom.
Chuck
